lib: fix target websocket debugger url
lib: fix target websocket debugger url

The upstream `websocketDebuggerUrl` would be reported for targets that have an
upstream connection instead of the local url.

This fixes that by generating it with `url.format`.

bradparks/amok,bradparks/amok,amokjs/amok,amokjs/amok,amokjs/amok,caspervonb/amok,caspervonb/amok,bradparks/amok,caspervonb/amok